Poppet valve



Jan. 10, 1933. R|HARD$ 1,894,254

POPPET VALVE Filed Feb. 5, 1930 Patented Jan. 10, 1933 v UNITED STATES PATENT OFFICE ALBERT EDWARD RICHARDS, F WAWOTA, SASKATCHEWAN, CANADA, ASSIGNOR OF ONE-THIRD TO ETHEL THOMPSON, OF WAWOTA, SASKATCHEWAN, CANADA POIPIET VALVE Application filed February 5, 1930, Serial No. 426,163, and in Canada February 7, 1929.

The present invention relates to improvements in a poppet valve and appertains particularly to an improved fastening means for retaining the lower end of the compressed valve spring on the stem of the valve.

An object is to provide a poppet valve having a valve spring holding means that is easily and quickly applied or removed.

A further obj ect of the invention is to provide a poppet valve having a valve spring keeper that locks on the valve stem by the resiliency of the compressed valve spring.

A further object of the invention is the provision of a poppet valve having a valve spring keeper of conical form and a spring pin which co-operate to lock on the valve stem and prevent unauthorized displacement of the valve spring.

A still further object of the invention is the provision of a poppet valve the stem of which is not weakened by a transverse perforation but is only recessed slightly on diametrically opposite sides near the end thereor", and finally it is an object of this invention to provide a device of the nature and for the purpose set forth that is characterized by structural simplicity, durability, ease of application and low cost of production, the same being thereby rendered commercially desirable.

To the accomplishment of these and related objects as will become apparent as the description proceeds, my invention resides in the construction, combination and arrangement of parts as shall be hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the claims hereunto appended.

The invention will be best understood and can be more clearly described when reference is had to the drawing forming a part of this disclosure wherein like characters indicate like parts throughout the several views.

In the drawing Figure l is a perspective of the spring pin;

Figure 2 is a perspective of the spring pin keeper;

Figure 3 is a section of the lower end of 50 a valve stem showing the relative positions and relation of the stem, valve spring, keeper and spring pin;

Figure 4 is a detail elevation of the same parts with the valve spring compressed and the keeper raised free of the spring pin so that the same releases from the valve stem; an

Figure 5 is a detail section of an internal combustion engine port with the poppet valve embodying my invention.

In carrying out this invention the stem 6 of the conventional poppet valve 7 may be bored right through in the usual manner for the reception of the locking pin but as this is not essential in the present instance, I prefer to drill a pair of aligned seats or depressions 8 in diametrically opposite sides of the stem 6, near the end thereof, the purpose of which will appear presently.

The valve spring 9, coils about the lower end of the valve stem 6 for holding the valve '7 in normally closed position, the spring 9 being compressed between the under side of the engine block projection and a keeper member 10. This keeper 10 is of conical configuration and hollow, having the smaller end uppermost and internally flanged as at 11 with a central bore 12 just sufficiently large to receive the valve stem 6 freely and the larger lower end exteriorly flanged as at 13 to provide a shoulder seat for the compressed coil spring 9 that bears against it.

The keeper 10 is applied to the valve stem 6 after the valve spring 9 is placed and then the keeper is forced up the stem compressing the valve. The spring pin 14 for locking the keeper 10 on the stem and retaining the valve spring 9 in a sufficiently compressed condition is next applied; this locking pin 14 being substantially semicircular, with a radius a little greater than the radius of the valve stem, and terminally provided with inturned confronting ends 15 that are spaced a distance equal to the valve-stein diameter. When the valve spring 9 has been compressed by raising the keeper 10 on the valve stem 6, as described, the spring pin 14- is applied to the stem. with the inturned ends 15 registering with the pair of diametrically opposite drill seats 8, equal in depth to the length of the said inturned ends 15 and as the keeper 10 is below the top flange of said conical keeper by allowed to descend, the tapered or conical the Seating of said inturned ends in said d1- inside wall presses inwardly on the spring metrlcally opposite socket openlngs providpin 14 forcing the ends 15 thereof into the ed for t en IBCGPUOII 1n said stem.

seats 8 prepared for their reception thus se- In mony whe eof I hereunto afiix my 70 curely locking the valve spring in a proper g restate of compression. EDWARD RICHARDS- To release this spring pin 14 for removal of the valve spring 9 for purposes of replace- 10 ment or repair, as when the valves must be ground or the like, the spring 9 is compressed in the usual and well known way by raising up on the keeper 10 thus freeing the spring pin 14 that opens out so that the ends 15 15 withdraw from the drilled seats 8 and are clear of the valve stem 6, either dropping to the ground or being easily removed therefrom.

One of the advantages resulting from this type of valve spring keeper and spring ring lock is that the valve stem need not be weakened to the extent of a here all the way through as in the usual valve stem used today while the principal feature is the ease with which the keeper and its locking pin can be applied or removed.

From the foregoing description taken in connection with the accompanying drawing, it will he manifest that a poppet valve is provided that will fulfil all. the necessary requirements of such a device, but as many changes could be made in the above description and many wioelv different embodiments of my invention constructed within the scope of the appended claims without departing from the spirit or scope thereof, it is intended that all matters contained in the said accompanying specification and drawing shall be interpreted as illustrative and not in a limited sense.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A poppet valve having a stem with diametrically opposite openings therein; a com pressed valve spring coiled on said stem; a conical keeper for said valve 5 ring flanged interiorly at the top to engage said stem and flanged exteriorlv at the bottom to hold said valve spring; and a semi-circular spring pin having inturned ends seating in the said openings of said stem and locking on the latter by the action of said compressed valve spring on said keeper.

2. A poppet valve having a stem with diametrically opposite socket openings therein;

a compressed valve spring coiled on said stem; a conical keeper for said valve spring flanged interiorly at the top to engage said 80v stem and flanged exteriorly at the bottom to hold said valve spring; and a substantially semi-circular spring pin with inturned ends spaced from each other a distance corresponding to the diameter of said stem; said spring pin being adapted to lock on said stem 130 

